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- Ramirez, Martina G.; Oliveri, Celina M.; Mismar, Dina; Barsoum, Amy; Abdulla, Jasmin
- Invertebrate Reproduction & Development 2015 v.59 no.2 pp. 96-103
- sex allocation, etc ; Araneidae; adults; daughters; eggs; females; males; mortality; mothers; sex ratio; sons; Show all 11 Subjects
- ... Male Mastophora cornigera exit egg sacs as adults, which allowed us to determine spiderling sex ratios and patterns of maternal investment in this species. We collected 15 egg sacs produced by seven mothers, which yielded 1945 emergent spiderlings which were sexed, 1850 of which were weighed. Two emergent broods were significantly male and female biased and were unaffected by pre-emergence mortali ...
- Gélin, Uriel; Wilson, Michelle E.; Coulson, Graeme; Festa‐Bianchet, Marco; Mysterud, Atle
- The journal of animal ecology 2015 v.84 no.1 pp. 239-248
- sex allocation, etc ; Macropus giganteus; breeding season; daughters; environmental factors; females; growth traits; indeterminate growth; lactation; mammals; monitoring; mothers; parturition; prediction; probability; reproductive performance; sons; weaning; Show all 18 Subjects
- ... When resources are scarce, female mammals should face a trade‐off between lactation and other life‐history traits such as growth, survival and subsequent reproduction. Kangaroos are ideal to test predictions about reproductive costs because they may simultaneously lactate and carry a young, and have indeterminate growth and a long breeding season. An earlier study in three of our five study popula ...